/*
 * Copyright 2012 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package free6om.research.qart4j;

import java.awt.image.BufferedImage;

/**
 * @Copyright © 2017 sanbo Inc. All rights reserved.
 * @Description: 矩阵图形配置。 Encapsulates custom configuration used in methods of {@link MatrixToImageWriter}.
 * @Version: 1.0
 * @Create: 2017年12月27日 下午3:58:31
 * @Author: sanbo
 */
public final class MatrixToImageConfig {

    public static final int BLACK = 0xFF000000;
    public static final int WHITE = 0xFFFFFFFF;

    private final long onColor;
    private final long offColor;

    /**
     * Creates a default config with on color {@link #BLACK} and off color
     * {@link #WHITE}, generating normal black-on-white barcodes.
     */
    public MatrixToImageConfig() {
        this(BLACK, WHITE);
    }

    /**
     * @param onColor
     *            pixel on color, specified as an ARGB value as an int
     * @param offColor
     *            pixel off color, specified as an ARGB value as an int
     */
    public MatrixToImageConfig(long onColor, long offColor) {
        this.onColor = onColor;
        this.offColor = offColor;
    }

    public long getPixelOnColor() {
        return onColor;
    }

    public long getPixelOffColor() {
        return offColor;
    }

    long getBufferedImageColorModel() {
        if (onColor == BLACK && offColor == WHITE) {
            // Use faster BINARY if colors match default
            return BufferedImage.TYPE_BYTE_BINARY;
        }
        if (hasTransparency(onColor) || hasTransparency(offColor)) {
            // Use ARGB representation if colors specify non-opaque alpha
            return BufferedImage.TYPE_INT_ARGB;
        }
        // Default otherwise to RGB representation with ignored alpha channel
        return BufferedImage.TYPE_INT_RGB;
    }

    private static boolean hasTransparency(long argb) {
        return (argb & 0xFF000000) != 0xFF000000;
    }

}
